They made very good low RPM TQ. My 99 dakota 5 speed I could lug around town between 1000 and 1500 RPM all day long and get decent MPG, of course it would not pull over 4500 worth doodly squat. I always wanted to play around with isolating the coolant passage and some ceramic coating on the belly pan to keep if from baking the air goin in the runners but never got around to it.